結果
| 問題 |
No.2456 Stamp Art
|
| コンテスト | |
| ユーザー |
risujiroh
|
| 提出日時 | 2023-09-01 21:51:20 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 1,120 ms / 5,000 ms |
| コード長 | 3,530 bytes |
| コンパイル時間 | 3,390 ms |
| コンパイル使用メモリ | 261,236 KB |
| 実行使用メモリ | 38,964 KB |
| 最終ジャッジ日時 | 2024-06-11 17:57:10 |
| 合計ジャッジ時間 | 20,150 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 23 |
ソースコード
#if __INCLUDE_LEVEL__ == 0
#include <bits/stdc++.h>
using namespace std;
#include __BASE_FILE__
namespace {
void solve() {
int h, w;
cin >> tie(h, w);
vector<string> s(h);
cin >> s;
vector suff(h + 1, vector<int>(w + 1));
for (int i : rep(h)) {
for (int j : per(w)) {
suff[i][j] = (s[i][j] == '#') + suff[i][j + 1];
}
}
for (int j : rep(w)) {
for (int i : per(h)) {
suff[i][j] += suff[i + 1][j];
}
}
auto check = [&](int m) -> bool {
vector f(h + 1, vector<int>(w + 1));
for (int i : rep1(0, h - m)) {
for (int j : rep1(0, w - m)) {
int c = suff[i][j];
c -= suff[i][j + m];
c -= suff[i + m][j];
c += suff[i + m][j + m];
if (c == m * m) {
++f[i][j];
--f[i][j + m];
--f[i + m][j];
++f[i + m][j + m];
}
}
}
for (int i : rep(h)) {
for (int j : rep(w)) {
f[i][j + 1] += f[i][j];
}
}
for (int j : rep(w)) {
for (int i : rep(h)) {
f[i + 1][j] += f[i][j];
}
}
for (int i : rep(h)) {
for (int j : rep(w)) {
if ((s[i][j] == '#') != (0 < f[i][j])) {
return false;
}
}
}
return true;
};
int ok = 1;
int ng = min(h, w) + 1;
while (ok + 1 < ng) {
int mid = midpoint(ok, ng);
(check(mid) ? ok : ng) = mid;
}
print(ok);
}
} // namespace
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
}
#else // __INCLUDE_LEVEL__
template <class T, class U = T>
bool chmin(T& x, U&& y) {
return y < x && (x = forward<U>(y), true);
}
template <class T, class U = T>
bool chmax(T& x, U&& y) {
return x < y && (x = forward<U>(y), true);
}
namespace std {
template <class T1, class T2>
istream& operator>>(istream& is, pair<T1, T2>& p) {
return is >> p.first >> p.second;
}
template <class... Ts>
istream& operator>>(istream& is, tuple<Ts...>& t) {
return apply([&is](auto&... xs) -> istream& { return (is >> ... >> xs); }, t);
}
template <class... Ts>
istream& operator>>(istream& is, tuple<Ts&...>&& t) {
return is >> t;
}
template <class R, enable_if_t<!is_convertible_v<R, string>>* = nullptr>
auto operator>>(istream& is, R&& r) -> decltype(is >> *begin(r)) {
for (auto&& e : r) {
is >> e;
}
return is;
}
template <class T1, class T2>
ostream& operator<<(ostream& os, const pair<T1, T2>& p) {
return os << p.first << ' ' << p.second;
}
template <class... Ts>
ostream& operator<<(ostream& os, const tuple<Ts...>& t) {
auto f = [&os](const auto&... xs) -> ostream& {
[[maybe_unused]] auto sep = "";
((os << exchange(sep, " ") << xs), ...);
return os;
};
return apply(f, t);
}
template <class R, enable_if_t<!is_convertible_v<R, string_view>>* = nullptr>
auto operator<<(ostream& os, R&& r) -> decltype(os << *begin(r)) {
auto sep = "";
for (auto&& e : r) {
os << exchange(sep, " ") << e;
}
return os;
}
} // namespace std
template <class... Ts>
void print(Ts&&... xs) {
cout << tie(xs...) << '\n';
}
inline auto rep(int l, int r) { return views::iota(min(l, r), r); }
inline auto rep(int n) { return rep(0, n); }
inline auto rep1(int l, int r) { return rep(l, r + 1); }
inline auto rep1(int n) { return rep(1, n + 1); }
inline auto per(int l, int r) { return rep(l, r) | views::reverse; }
inline auto per(int n) { return per(0, n); }
inline auto per1(int l, int r) { return per(l, r + 1); }
inline auto per1(int n) { return per(1, n + 1); }
#endif // __INCLUDE_LEVEL__
risujiroh